<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title>我是二个网页</title>
		<style type="text/css">
			div{
				width: 200px;
				height: 100px;
				background: red;
				margin: 20px auto;
				border-radius: 10px;
			}
			div:nth-child(5){
				display: none;
			}
		</style>
	</head>
	<body>
		<div>dsfsdfa </div>
		<div>sdffsdfds</div>
		<div>khjukjjhk</div>
		<div>iuooiuoi</div>
		<div>khjukjjhk</div>
		<div>iuooiuoi</div>
		<div>dsfsdfa </div><div>dsfsdfa </div>
		<div>sdffsdfds</div>
		<div>khjukjjhk</div>
		<div>iuooiuoi</div>
		<div>khjukjjhk</div>
		<div>iuooiuoi</div>
		<div>dsfsdfa </div>
	</body>
</html>
